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(parent: 4c6bdb3) | patch
mm/z3fold: fix possible null pointer dereferencing
authorMiaohe Lin <linmiaohe@huawei.com>
Fri, 29 Apr 2022 06:40:43 +0000 (14:40 +0800)
committerakpm <akpm@linux-foundation.org>
Fri, 27 May 2022 16:33:43 +0000 (09:33 -0700)
commit7c61c35bbd6a888416e5a6de8ff8782a70d013d4
treed062095fadf78cede1c32b05ceb42f05ad98d234tree | snapshot
parent4c6bdb36408fbe4697eb9f1d95a3ddc1d2348448commit | diff
mm/z3fold: fix possible null pointer dereferencing

alloc_slots could fail to allocate memory under heavy memory pressure.  So
we should check zhdr->slots against NULL to avoid future null pointer
dereferencing.

Link: https://lkml.kernel.org/r/20220429064051.61552-3-linmiaohe@huawei.com
Fixes: fc5488651c7d ("z3fold: simplify freeing slots")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/z3fold.c diff | blob | history
Domain: System / Kernel;